Abstract:

he transfer coefficient α of nitrobenzene electrochemical reduction in RMimBF₄ was investigated by cyclic voltammetryIt is showed that with the increasing of the concentration of nitrobenzene in RMimBF₄，α decreases，while temperature make reversed effect at the same nitrobenzene concentrationα decreases in the order EMimBF₄＞BMimBF₄＞HMimBF₄，at equal nitrobenzene concentration，the value of α is reduced in EMimBF₄-H₂O at low water concentration and has reversed effect at high water concentration

Key words:

硝基苯, 离子液体RMimBF₄, 电还原, 传递系数

摘要：

采用循环伏安法研究了离子液体RMimBF₄中硝基苯在微铂电极上电还原动力学特性参数——传递系数α的变化规律。研究结果表明，离子液体中，硝基苯电还原过程的第2个电子转移反应是速度控制步骤。该反应的传递系数α随硝基苯浓度增加而减小;相同浓度时，温度升高，α迅速增大。在离子液体EMimBF₄-水-硝基苯体系中，相同硝基苯浓度下，随水含量增加，α先减小，后增大。不同离子液体中，α的变化规律为：EMimBF₄＞〖JP〗BMimBF₄＞HMimBF₄。

关键词:

硝基苯, 离子液体RMimBF₄, 电还原, 传递系数